Commutator-section of cast alloy.



UNITED STATES PATENT OFFICE.

HENRY K. 'SANDELL, or CHICAGO, ILLInoIS, ASSIGNOR T0 HERBERT s. MILLS, or CHICAGO, ILLINOIS.

COMMUTATOR-SEC'IION OF CAST AL LOY.

He Drawing.

To all whom it may concern:

Be it known that I, HENRY K. SANDELL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Commutator-Sections of Cast Alloys, of Which the following is a specification.

My invention relates to certain improvements in cast commutator sections or the like parts of dynamo electric machinery, such as collector rings.

1 have discovered that an alloy of 95 parts by Weight of copper and 5 parts by Weight of nickel is particularly desirable and possesses many advantages over. known alloys and metals used for this purpose.

Specification of Letters Patent.

Patented Dec. 4, 1917.

Application filed June 18, 1917. Serial No. 175,370.

HENRY .K. SANDELL. 

